elias



March 18 1924,

' J. ELIAS Ronni HAMMER Filed Jan. '7, 1922 mg H 707 lfatented Mar. 18, 1 924 UNETE ST res earner hdttfitt TFEQE.

ROTARY HAMMER.

Application filed January 7, 1922. Serial No. 527,667;

T 0 all whom it may concern: 7

Be it known that I, JOHN ELIAS, of the town of Plum Coulee, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Rotary Hammers, of which the following is a specification.

The invention relates to improvements in rotary hammers and an object of the invention is to provide a hammer particularly adapted for heavy work and especially useful for farmers and such like persons having a considerable amount of farm repair work to do and arranged so that it can be power driven and under the complete con trol of the attendant in striking.

A further object is to construct the machine in a simple, durable and inexpensive manner and such that it leaves the hands free for manipulating the work.

With the above more important objects in view the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described and later pointed out in the appended claim, reference being had to the accompanying drawing in which Fig. 1 is a side view of the complete device.

Fig. 2 is a plan view thereof.

Fig. 3 is a vertical sectional view centrally through the machine.

In the drawing like characters of reference indicate corresponding parts in the several figures.

An open ended elevated frame 1 is provided which is supported by suitable corner legs 2. Centrally of the frame I locate a cross shaft 3 carried by suitable bearings 4t and 5 mounted on the frame. The shaft is fitted at one end with a driving pulley 6 and between the bearings with a pair of similar opposing discs 7 and 8 fixed to the shaft. The discs are connected by an anchor pin 9, a pivot pin 10 and a stop pin 11, these being suitably located one in respect to the other. The hammer 12 is carried by an arm 13 which is pivotally mounted on the pin 10. The arrangement of the pins 10 and 11 is such that the pin 10 acts as a stop or rest for the hammer in the position shown best in Fig. 3. A strap 14 passes from the anchor pin to the shaft, the ends of the plate being turned around the pin and shaft and a rod 15 passes slidably through the strap and is pivotally connected at 16 to the top side of the hammer arm. A spring 17 is mounted on the rod between the arm and the strap and normally acts to press the hammer arm downwardly against the stop pin. An anvil 18 is mounted on one end of the frame, the anvil in the present instance being a short length of railway track which I have found suitable for the purpose. The anvil has one side hinged to the frame as indicated at 19 so that it can be swung outwardly to a position such as shown in dotted outline in Fig. 1. To the outer side of the base of the anvil I connect two arms 20 and 21 to which I attach springs 22 which pass downwardly and have their lower ends fastened to the legs. To one end of the anvil I secure permanently an inwardly extending arm 23 which is connected by a rod 24 to a foot pedal 25, the forward end of the pedal being pivot-- ally attached to one of the front legs 26.

When in operation the attendant puts his foot on the extending end of the pedal, presses it down and holds it'down. This maintains the anvil in the position shown in the several figures. In this position of the parts the springs 22 are extended so that immediately the foot pressure is released from the pedal the springs 22 operate to swing the anvil to the dotted position and clear of the hammer.

When in use the foot pedal is depressed as aforesaid, the work is placed on the anvil and the pulley 6 is power driven in any suitable manner. As the discs rotate in the direction indicated by the applied arrow Fig. 3 they carry the hammer with them which strikes a heavy blow on the anvil and then escapes past the anvil as the pivot point 10 is at this time travelling quickly away from the anvil. Repeated hlows are struck as long as the anvil is maintained in working position and during this time the attendant has his hands completely free to manipulate the work as he desires. hen he wishes to inspect the work or leave the machine a short time he releases the foot pedal and frees the anvil to swing clear of the hammer which will continue rotating without striking.

It will be readily understood that if desired a catch could be provided to hold the pedal down. Such a device is so well known that I have not considered it necessary to show the same.

In the rotation of the hammer it will be apparent that the spring 17 acts to hold the hammer in contact with the pin 10 thereby retaining it relatively in a fixed position.

hat I claim as my invention is In combination, an elevated open ended frame, a driving shaft carried by the frame, a pair of opposing discs secured to the shaft, an eccentrioally positioned pivot pin connecting the discs, a hammer, an arm carrying the hammer and pivotally mounted on the pin, a stop pin engaging one side of the arm, an anchor pin extending between the discs, a strap extending radially between the anchor pin and the shaft, a rod pivotally attached to the hammer arm and passing slidably through the strap, a spring mounted on the rod and engaging the arm and the strap and pressing the arm towards the stop pin and an anvil mounted on one end of the frame and adapted normally to be struck by the hammer in the rotation of the shaft.

Signed at Morden the 19th day of September, 1921.

JOHN ELIAS. In the presence of- MARY BELL, D. BARRON MEIKLE. 

